package com.changgou.page.service.impl;

import com.alibaba.fastjson.JSON;
import com.changgou.goods.feign.CategoryFeign;
import com.changgou.goods.feign.SkuFeign;
import com.changgou.goods.feign.SpuFeign;
import com.changgou.goods.pojo.Category;
import com.changgou.goods.pojo.Sku;
import com.changgou.goods.pojo.Spu;
import com.changgou.page.service.PageService;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import java.io.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class PageServiceImpl implements PageService {

    @Autowired
    private SpuFeign spuFeign;

    @Autowired
    private TemplateEngine templateEngine;

    @Value("${pagepath}")
    private String pagepath;

    @Override
    public void generateItemPage(String spuId) {

        //获取context对象,用于存放商品详情数据
        Context context = new Context();
        Map<String,Object> itemData = this.findItemData(spuId);
        context.setVariables(itemData);
        //获取商品详情页生成的指定位置
        File dir = new File(pagepath);
        //判断商品详情页文件夹是否存在,不存在则创建
        if (!dir.exists()){
            dir.mkdirs();
        }
        //定义输出流,进行文件生成
        File file = new File(dir + "/" + spuId + ".html");
        Writer out = null;

        try {
            out = new PrintWriter(file);

            //生成静态化页面
            /*
            模板名称
            context
            输出流
             */
            templateEngine.process("item",context,out);

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }finally {
            //关闭流
            try {
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

    @Autowired
    private CategoryFeign categoryFeign;

    @Autowired
    private SkuFeign skuFeign;

    private Map<String,Object> findItemData(String spuId) {

        Map<String,Object> resultMap = new HashMap<>();

        //获取spu
        Spu spu = spuFeign.findSpuById(spuId).getData();
        resultMap.put("spu",spu);

        //获取图片信息
        if (spu != null && StringUtils.isNotEmpty(spu.getImages())){
            resultMap.put("imageList",spu.getImages().split(","));
        }

        // 获取商品的分类信息
        Category category1 = categoryFeign.findById(spu.getCategory1Id()).getData();
        resultMap.put("category1",category1);
        Category category2 = categoryFeign.findById(spu.getCategory2Id()).getData();
        resultMap.put("category2",category2);
        Category category3 = categoryFeign.findById(spu.getCategory3Id()).getData();
        resultMap.put("category3",category3);

        //获取sku相关信息
        List<Sku> skuList = skuFeign.findSkuListBySpuId(spuId);
        resultMap.put("skuList",skuList);

        //获取商品规格信息
        resultMap.put("specificationList", JSON.parseObject(spu.getSpecItems(),Map.class));
        return resultMap;

    }
}
